What is the cleanest lake near Blue Mesa Reservoir?

Crystal Reservoir in Montrose County holds a Grade A water quality score and is 25.4 miles from Blue Mesa Reservoir.

Why is Blue Mesa Reservoir not Grade A?

Blue Mesa Reservoir holds Grade B, with about 11.5 ft of water clarity and 35 µg/L of phosphorus. The grade reflects measured water quality against Metropolitan Council thresholds. Cleaner alternatives nearby score higher on clarity, phosphorus, or chlorophyll-a.

Are these recommendations based on real data?

Yes. Every grade is calculated from EPA Water Quality Portal samples for the lake. Recommendations are limited to lakes within 30 miles of Blue Mesa Reservoir in Colorado, with strictly higher numeric grade scores and sufficient monitoring data.

Cleaner Lakes Than Blue Mesa Reservoir, Top 1 Within 30 Miles, LakeQuality

Cleaner Lakes Than Blue Mesa Reservoir

1 higher-graded lake within 30 miles, ranked by grade improvement and proximity.

Blue Mesa Reservoir carries a Grade B (Good) water quality score. Within 30 miles, 1 lake holds a higher grade. Crystal Reservoir (Montrose County, Grade A, 25.4 mi away) is the closest meaningful upgrade.

Crystal Reservoir

Montrose County, Colorado · 25.4 mi from Blue Mesa Reservoir

+Higher grade (B → A)
++3.9 ft water clarity
+Lower phosphorus (15.7 vs 35 µg/L)

Reading the cohort

Just one nearby water body scores higher than Blue Mesa Reservoir on the EPA metrics within a 30-mile radius. The single cleaner option (below) is the practical alternative; beyond that, the next-cleanest lakes sit farther out and warrant a longer drive only if the water-quality difference is the deciding factor.

The nearest cleaner alternative — Crystal Reservoir in Montrose County — sits 25.4 miles from Blue Mesa Reservoir, putting it firmly in "destination trip" rather than "neighborhood swap" range. The water-quality gap has to be the deciding factor; for a casual outing, Blue Mesa Reservoir is the practical choice and the cleaner options are reserved for purpose-specific visits.

The EPA water-quality grading combines clarity (Secchi depth), phosphorus, and chlorophyll-a measurements from state environmental sampling. A higher letter grade reflects measurably cleaner water on those indicators, not subjective beauty or access quality — a Grade A lake might have worse boat-launch facilities or shoreline access than a Grade C neighbor, so the ranking is one input alongside the rest of trip planning. See the methodology page for the full grading formula.

How this list is built

Every lake on LakeQuality has a calculated grade from EPA Water Quality Portal samples — secchi depth, total phosphorus, and chlorophyll-a measured against Metropolitan Council thresholds. To suggest cleaner alternatives, we filter lakes within 30 miles to those with a strictly higher numeric score, then rank by grade improvement with a small proximity tiebreak. Cross-state and limited-data lakes are excluded so the list stays locally relevant.